Engine
Remove both cotter pins.
Release the valve springs.
Remove the cap and the valve spring.
Checking the overhead camshaft
Check the camshaft bearings for signs
of abnormal wear.
Characteristic
Standard diameter - Bearing A
19.980 - 19.959 mm (0.7866 - 0.7858 in)
Minimum diameter allowed - Bearing A
19.95 mm (0.7854 in)
Inlet cam height
31.488 mm (1.23968 in)
Exhaust cam height
30.864 mm (1.21511 in)
Check that the holes used for timing and their shoulders are not worn.
If values measured are not within the specified limits or there are signs of wear, replace the
defective components with new ones.
Characteristic
Maximum axial clearance allowed:
0.4 mm (0.0157 in)
ENG - 156
Dune 125 - Dune X 125 - Euro 4